a) State whether the following statement is TRUE (T) or FALSE (F): (6 marks) i) Metadata describes the data characteristics and the set of relationships that link the data found within the database. ii) The One-to-Many (1:M) relationship is easily implemented in the relationship model by putting the foreign key of the "1" side table into the table of the "many" side table as a primary key. iii) A weak entity has a primary key that is partially or totally derived from the parent entity in the relationship. iv) Dependencies that are placed on only a part of a composite primary key are called transitive dependencies. v) SELECT is one of the DDL commands. vi) DESCRIBE command is used to display the structure of a table.
Added by Micheal R.
Close
Step 1
This statement is TRUE. Metadata provides information about the data in a database, including its characteristics and relationships. ii) The One-to-Many (1:M) relationship is easily implemented in the relationship model as a primary key. This statement is FALSE. Show more…
Show all steps
Your feedback will help us improve your experience
Danielle Ashley and 91 other AP CS educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Characteristics and Diagrams Table 2. Statements about Characteristics and Diagrams: True (T) or False (F). Statement T or F Mark .a) An ancestral group has fewer-derived (more primitive) characteristics. .b) A branch in an evolutionary tree connects 'older' and 'newer' groups. .c) A clade is any set of groups connected by a common ancestor. .d) A derived characteristic is a more specialized trait. .e) In an evolutionary tree, a node is a point of divergence. .f) A primitive form will be closer to (fewer branches from) the tree root. .g) A group can be a single species, or species with a common ancestor. .h) There will be more branches between a 'higher' group and the root. .i) An internal node represents a more recent ancestor (of some groups). .j) A species can 'jump' to a higher level of the tree. Total
Md.Daniyal A.
(1 point) Are the following statements true or false? 1. Let m < n. If U = {u1, u2, ..., um} in Rn is a list of vectors, we can always form a basis for Rn by adding n - m appropriately chosen vectors to U. 2. If S1 is of dimension 3 and is a subspace of R4, then there can not exist a subspace S2 of R4 such that S1 ⊂ S2 ⊂ R4 with S1 ≠ S2 and S2 ≠ R4. 3. Let m > n. Then U = {u1, u2, ..., um} in Rn can form a basis for Rn if the correct m - n vectors are removed from U. 4. Rn has exactly one subspace of dimension m for each of m = 0, 1, 2, ..., n. 5. The nullity of a matrix A is the same as the dimension of the subspace spanned be the columns of A.
Likhit G.
Are the following statements true or false? 1. If every vertex of a graph has degree 6 or less, then the chromatic number of the graph is at most 6. 2. If H is a subgraph of G, then χ(H) = χ(G) 3. If a graph contains a subgraph isomorphic to K6, then the chromatic number of the graph is 6 4. If the chromatic number of a graph is at most 4, then the graph is planar 5. If a graph contains a subgraph isomorphic to K6, then the chromatic number of the graph is at least 6
Adi S.
Recommended Textbooks
Computer Science and Information Technology
Introduction to Programming Using Python
Computer Science - An Overview
100,000+
Students learning Computer Science with Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD